Basic concepts of electromagnetic interaction
Electromagnetic interaction One of the four basic interactions in nature. It is the interaction between the charged particles and the electromagnetic field and the interaction between the charged particles transmitted through the electromagnetic field. It is second only to the four types of interactions in intensity. Electromagnetic interactions and gravitational interactions are long-range forces that can act on distances on a macroscopic scale and appear as macroscopic phenomena. The macro-electromagnetic interaction theory is summarized in Maxwell's equations and has been mastered by people since the 19th century. Microscopic electromagnetic interaction theory is quantum electrodynamics, which is a combination of Maxwell's electromagnetic theory and quantum mechanical principles.